Belt moving device and image forming apparatus using same
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United States of America Patent
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Dec 14, 2010
Grant Date -
Sep 4, 2008
app pub date -
Oct 25, 2007
filing date -
Oct 30, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
In a belt moving device that is capable of reducing belt speed fluctuation and positional deviation from a target belt position in a sub-scanning direction and performing highly precise position control in a main scanning direction, and an image forming apparatus that uses this belt moving device to prevent color shift in both the main scanning direction and sub-scanning direction of a formed image such that a high-quality image can be formed, belt shift control means reduce shift position variation within a single round trip of an endless belt by feeding back a target value for canceling out the shift position variation within a single round trip of the endless belt and feeding forward a value obtained by multiplying an inverse transfer characteristic of moving means by a transfer characteristic of a target value of the moving means in relation to the control content of the moving means.
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